package main

import (
	//"bufio"
	"bytes"
	"code.google.com/p/go.text/encoding/simplifiedchinese"
	"code.google.com/p/go.text/transform"
	"flag"
	"fmt"
	goq "github.com/PuerkitoBio/goquery"
	"io/ioutil"
	"net"
	"net/http"
	"os"
	//"runtime"
	//"strconv"
	"strings"
	"sync"
	"time"
)

var (
	main_domain = "" //主域名
	waitgroup   = &sync.WaitGroup{}
	LOG         = "ganji"
	mutex       = &sync.Mutex{}
)

func main() {
	citycode := flag.String("citycode", "tj", "请输入城市编号，例如 tj")
	flag.Parse()

	switch *citycode {
	default:
		{
			main_domain = "http://" + *citycode + ".ganji.com"
			LOG = *citycode + "." + LOG
			break
		}
	case "bj":
		{
			main_domain = "http://bj.ganji.com"
			LOG = "bj." + LOG
			break
		}
	}
	getDistrict("/fang/agent/")
	fmt.Println("done.")
}

//获取区县
func getDistrict(url string) {
	tmpurl := fmt.Sprintf("%s%s", main_domain, url)
	doc, e := getDoc(tmpurl)
	if e != nil {
		return
	}
	doc.Find(".posrelative a").Not(".cur").Each(func(i int, sec *goq.Selection) {
		var (
			district, link string
		)
		district = filterStr(sec.Text())
		link, ok := sec.Attr("href")
		if ok {
			getBlock(link, district)
		}
	})
}

//获取热点
func getBlock(url string, district string) {
	tmpurl := fmt.Sprintf("%s%s", main_domain, url)
	doc, e := getDoc(tmpurl)
	if e != nil {
		return
	}
	doc.Find(".subarea a").Not(".cur").Each(func(i int, sec *goq.Selection) {
		var (
			block, link string
		)
		block = filterStr(sec.Text())
		link, ok := sec.Attr("href")
		if ok {
			getAgentlist(link, block, district)
		}
	})
}

//获取agentlist
func getAgentlist(url string, block, district string) {
	Ending := false
	for curpage := 1; curpage <= 30; curpage += 5 {
		for j := curpage; j < curpage+5 && j <= 30; j++ {
			tmpurl := fmt.Sprintf("%s%so%d/", main_domain, url, j)
			doc, e := getDoc(tmpurl)
			if e != nil {
				continue
			}

			findout := doc.Find(".list-broker").Find(".list-img")
			if findout.Length() > 0 {
				waitgroup.Add(1)
				go func(findout *goq.Selection) {
					defer waitgroup.Done()
					findout.Each(func(i int, sec *goq.Selection) {
						var (
							broker_name     string //经纪人
							broker_tel      string //tel
							service_company string //company
							service_shop    string //shopname
							service_xq      string //服务小区
						)
						broker_name = filterStr(sec.Find(".broker-name").Text())
						broker_tel = filterStr(sec.Find(".broker-tel").Text())
						broker_service := sec.Find(".broker-service").Children()
						if broker_service.Eq(0).Text() != "" {
							tmp_service := filterStr(strings.Replace(broker_service.Eq(0).Text(), "经纪公司：", "", -1))
							tmp_service = strings.Replace(tmp_service, "－", "-", -1)
							tmp_arr := strings.Split(strings.Replace(tmp_service, "-", "||", 1), "||")
							if len(tmp_arr) >= 2 {
								service_company = tmp_arr[0]
								service_shop = tmp_arr[1]
							} else {
								service_company = tmp_arr[0]
								service_shop = "对方未提供"
							}
						}
						tmp_xq := sec.Find(".service-xq").Find("a").Map(func(i int, sec *goq.Selection) string {
							return filterStr(sec.Text())
						})
						service_xq = strings.Join(tmp_xq, ",")
						str := district + "||" + block + "||" + broker_name + "||" + broker_tel + "||" + service_company + "||" + service_shop + "||" + service_xq
						outlog(str)
					})
				}(findout)
			} else {
				Ending = true
			}
			if Ending {
				break
			}
		}
		waitgroup.Wait()
		time.Sleep(3 * time.Second)
		if Ending {
			break
		}
	}
}

//获取doc
func getDoc(url string) (*goq.Document, error) {
	res, e := getResp(url)
	if e != nil {
		return nil, e
	}
	doc, e := goq.NewDocumentFromResponse(res)
	if e != nil {
		return nil, e
	}
	return doc, nil
}

//获取response
func getResp(url string) (*http.Response, error) {
	req, e := http.NewRequest("GET", url, nil)
	req.Header.Add("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8")
	//req.Header.Add("Accept-Encoding", "gzip,deflate,sdch")
	req.Header.Add("Accept-Language", "zh-CN,zh;q=0.8")
	req.Header.Add("Cache-Control", "max-age=0")
	req.Header.Add("Proxy-Connection", "keep-alive")
	req.Header.Add("User-Agent", "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63 Safari/537.36")
	c := &http.Client{
		Transport: &http.Transport{
			Dial: func(netw, addr string) (net.Conn, error) {
				deadline := time.Now().Add(25 * time.Second)
				c, err := net.DialTimeout(netw, addr, time.Second*20)
				if err != nil {
					return nil, err
				}
				c.SetDeadline(deadline)
				return c, nil
			},
		},
	}

	var resp *http.Response
	//尝试三次
	for retry := 0; retry < 3; retry++ {
		resp, e = c.Do(req)
		if e != nil {
			time.Sleep(time.Second * 1)
		} else {
			break
		}
	}
	if e != nil {
		return nil, e
	}
	return resp, nil
}

//gbk->utf8
func G2U(s string) string {
	ret, e := gbktoutf8([]byte(s))
	if e != nil {
		return ""
	}
	return string(ret)
}

//utf8->gbk
func U2G(s string) string {
	ret, e := utf8togbk([]byte(s))
	if e != nil {
		return ""
	}
	return string(ret)
}

func gbktoutf8(s []byte) ([]byte, error) {
	reader := transform.NewReader(bytes.NewReader(s), simplifiedchinese.GBK.NewDecoder())
	d, e := ioutil.ReadAll(reader)
	if e != nil {
		return nil, e
	}
	return d, nil
}
func utf8togbk(s []byte) ([]byte, error) {
	reader := transform.NewReader(bytes.NewReader(s), simplifiedchinese.GBK.NewEncoder())
	d, e := ioutil.ReadAll(reader)
	if e != nil {
		return nil, e
	}
	return d, nil
}

func filterStr(str string) string {
	str = strings.Replace(str, "\r\n", "", -1)
	str = strings.Replace(str, "\r", "", -1)
	str = strings.Replace(str, "\n", "", -1)
	str = strings.Replace(str, "#", "", -1)
	str = strings.TrimSpace(str)
	return str
}

func s(a ...interface{}) {
	fmt.Println(a)
}

//outlog
func outlog(str string) {
	pwd, _ := os.Getwd()
	outlog := fmt.Sprintf("%s/%s_log.txt", pwd, LOG)
	file, err := os.OpenFile(outlog, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0600)
	defer file.Close()
	if err != nil {
		return
	}
	str += "\n"
	file.WriteString(str)
}
